<SEC-DOCUMENT>0001104659-18-001424-index.html : 20180109
<SEC-HEADER>0001104659-18-001424.hdr.sgml : 20180109
<ACCEPTANCE-DATETIME>20180109121014
ACCESSION NUMBER:		0001104659-18-001424
CONFORMED SUBMISSION TYPE:	6-K
PUBLIC DOCUMENT COUNT:		3
CONFORMED PERIOD OF REPORT:	20180109
FILED AS OF DATE:		20180109
DATE AS OF CHANGE:		20180109

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			GERDAU S.A.
		CENTRAL INDEX KEY:			0001073404
		STANDARD INDUSTRIAL CLASSIFICATION:	STEEL WORKS, BLAST FURNACES & ROLLING & FINISHING MILLS [3310]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			D5
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		6-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-14878
		FILM NUMBER:		18518434

	BUSINESS ADDRESS:	
		STREET 1:		AVENIDA FARRAPOS, 1811
		CITY:			PORTO ALEGRE, RIO GRANDE DO SU
		STATE:			D5
		ZIP:			90220-005
		BUSINESS PHONE:		011-55-51-3323-2703

	MAIL ADDRESS:	
		STREET 1:		AVENIDA FARRAPOS, 1811
		CITY:			PORTO ALEGRE, RIO GRANDE DO SU
		STATE:			D5
		ZIP:			90220-005

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	GERDAU SA
		DATE OF NAME CHANGE:	19981112
</SEC-HEADER>
<DOCUMENT>
<TYPE>6-K
<SEQUENCE>1
<FILENAME>a18-2542_16k.htm
<DESCRIPTION>6-K
<TEXT>
Document 1 - file: a18-2542_16k.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>2
<FILENAME>a18-2542_1ex99d1.htm
<DESCRIPTION>EX-99.1
<TEXT>
Document 2 - file: a18-2542_1ex99d1.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>g25421mmi001.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: g25421mmi001.gif

</DOCUMENT>
</SEC-DOCUMENT>